Authors: Jun Qian Zongqiang Chen Wudeng Wang Yudong Li Jingjun Xu Qian Sun
Publish Date: 2014/07/10
Volume: 9, Issue: 6, Pages: 1361-1369
Abstract
In this study the optical properties induced by dual symmetry breaking including both shell cutting and core offsetting in the goldsilicagold multilayer nanoshells have been studied by the discrete dipole approximation simulations and the plasmon hybridization theory The influences of the incident polarization and geometrical parameters on the plasmon resonances of these dualsymmetrybreaking AusilicaAu multilayer nanoshells DSMNS are investigated Under the combined effect of the two types of symmetry breaking it is found that the polarizationdependent multiple plasmon resonances can be induced in the DSMNS By changing the polarization of 90o the switching of the two transparency windows can be flexibly adjusted in the DSMNS with different types of Au core offsetting This polarizationcontrolled transparency is likely to generate a wide range of photonic applications such as filters and color displays Furthermore the local refractive index sensitivity of the DSMNS is also investigated and the triple extinction peaks simultaneous shift is found as the surrounding medium changed which suggests the potential applications for biological sensorsThis work is supported by the National Natural Science Foundation of China 11304164 61178004 Specialized Research Fund for the Doctoral Program of Higher Education of China 20130031120006 Program for Changjiang Scholars and Innovative Research Team in Nankai University
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